Motor-block stand



Dec. 28, 11.1937.r w. G. VOLLMER MOTOR BLOCK STAND Filed Aug. 21, 1936 09T //m N N /O E ,my m N r of j# a UNITEDSTATES PATE-Nr Patented Dec. 28, 1937 MOTOR-BLOCK "STAND Walter G. Vollmer, St. Louis, Mo., assigner ,to H & `H Machine & Motor Parts Co., St. Louis,V

M0., a corporation of Missouri l l :u Appncationnugust 21, 1936 sentirne-197,199 f 3 claims; (Ci."7`7V-'63)j This inventionrelates generally to machine shop fixtures. More particularly, my inventionV relates to a certain new and'use'ful improvement in stands for supporting automotive engine blocks in poi Sition `for `cylinderboring and has for its primary object the provision of' a sturdy, durable, inexpensive cradle-like vstand for supporting the block Y Figure 1 is ahorizontal plan view of a machine shop fixture or stand constructed according to and embodying my present invention; and

Figure 2 is an endelevational View of the fixturel or stand. A

Referringnow more in detail and by reference characters to the drawing, which discloses a pre'- ferred form of my present invention, the iixture includes a standard comprising a preferably cast metal orV otherwise suitably formed skeleton endframe I having a central upstanding yoke coneshaped in end elevation and socalied arms extending outwardly from, and on-opposite sides of, the base ofthe yoke, said arms being provided or formed at their respective upper'outer corners with preferably integrally formed sleeves 2, 2'. Preferably integrally formed in` theape'x of the yoke of the end frame I, is a sleeve or bearing-4, through which is an internally threaded hole for receiving al Wing knob set screw or the like 6.

The frame I is also provided with laterally Voutv wardly facing side surfaces 7, 8, and is further provided along its bottomwitli machined surfaces '9, I0, carefully milled so as to lie precisely in the same plane, thereby providing anaccurate bed surface for the xture or stand.

Engaged at one respective extremity'vvithin the sleeves 2, 2', and secured rigidly therein by means of set screws or the like II, are longitudinally extending side rods or Work positioning means I2, I2', mounted similarly on the opposite extremities of which is a second end-frame I3 in all respects similar to the end-frame I and completing the standard of the xture, the frame I3 having like laterally disposed sleeves` I 4, I 4', and a centrally disposed bearing sleeve I5, and the respective axes ofthe several Vsleeves of one end-frame beingin alignment with the axes of the like sleeves on the opposite end frames. Accordingly, Vwhen pointed out in the the rods Rare-engaged attheir respectiveopposite `extremities fin the sleeves,l 2, vId, ,the endfrarnes I, v.I'Ei'fvv'ill belrigidly--secured together Vin suitablyspaced parallel 1relationi,the 1correspo1id-V ingly opposite machine end surfaces-thereof lying in la single, plane andthe axes ofgthefbearing sleeves li'; I'5,extendingin-the,sai'nelline.,- s1-f. Positioned Within the sleeves` 13,-!5,I are arbors or trunnions IE?, Iii, respectivelyjgthe arbors, i6, il, extendinguaicialiy toward each Othllandbeing of asuitable circumferential size to snugly fit the semi-circular aligned surfaces of the end( main bearing portions formed in a standard automotive cylinder block, such, for instance, as the block A shown. The axes of the rods l2 are parallel to the axial line of the arbors It, Il, and are so positioned with respect to such axial line that the usual or normal cylinder head retaining bolts I 8 of a particular V-type cylinder block A,

for which the fixture or stand is especiallydesigned, may rest thereupon in such manner that the opposite bank of cylinders, as a, Will be disposed in a truly Vertical plane for cylinder boringoperation, as is best illustrated by the position of the 4cylinder block A as indicated vin dotdash lines in Figure 1 and in full lines in Figure 2. It will be apparentY that, when the one bank of cylinders a has been completely bored, the cylinder'boring tool may be Withdrawn from the cylinder block and the cylinder block rotated or oscillated about the arbors It, il, through an angleY of 90 from the position indicated at B in Figure 2 to the position indicated at B', thus bringing the other bank of cylinders into vertical cylinder boring position.

The present stand or xture thus enables a V-type automotive cylinder block to be positioned for Vcylinder boring or other desired operations in a simple, economical manner and to be selectively swung and supported so that both banks of cylinders may be bored without the necessity of relining and resetting.

The present stand or fixture further providesV ment without laboriously resettingY the entire machine and tool assembly for each separate boring operation.

The present stand also provides an inexpensive, economically constructed machine shop fixture suitable for the purposes described, which is of comparatively simple and convenient design and is practically proof against errors arising from multiplied resetting and repositioning of the boring tools, which heretofore, so far as I am aware, have been required in effecting operations of the type mentioned.

The stand is sturdy and durable, easily assembled and likewise as easily knocked down for compact convenient handling or shipment, and is exceedingly efcient in the performance of its intended functions.

It will be understood that changes and modifications in the form, construction, arrangement, and combination of the several parts of the xture may be made and substituted for those herein shown and described Without departing from the nature and principle of my present invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is,-

1. A stand for supporting an engine block structure and positioning the structure for cylinder boring operations, comprising a pair of supporting frames spaced apart a distance greater than the length of the engine structure, opposed arbors carried by the frames engaging the main bearings of an engine structure therebetween for oscillatory movement, said frames having portions denitely locating the block With respect to the Work supporting table of a boring machine, and means on said frames denitely limiting os cillatory movement of the engine structure to dispose the cylinder openings in definitely located relation to the work supporting table.

2. An engine block reboring iixture to support a block in a boring machine comprising a supporting frame structure, opposed spaced arbors on the frame structure engageable in shaft bearings of the engine block and thus supporting said block for oscillatory movement, the frame structure having base rest portions positioning the frame in predetermined relation on the work supporting table of a boring machine, and means on the frame stopping oscillatory movement of the engine block to position the cylinder bores in predetermined axial angular relation with respect to the Work supporting table.

3. In an engine cylinder block reboring fixture for use in supporting and positioning upon the Work table of a boring machine a cylinder block having extending stud bolts spaced away from the cylinder opening, a frame structure having supporting portions receivable upon the Work table, opposed arbors carried by the frame structure spaced above the supporting portions receivable in the main bearings of an engine block for supporting the block for oscillatory movement, and means on the supporting frame engagable with the stud bolts stopping oscillatory movement of the block to position said block With the axes of the cylinder openings in predetermined angular relation to the plane of the work supporting table.

WALTER G. VOLLMER. 

